Which statement about gravity is true? a) gravity only takes place between planets b) the moon doesn't have any gravity
c) gravity causes objects to pull towards one
another
d) gravity causes objects to push away from
each other

Amassive tractor rolls down a country road. in a perfectly inelastic collision, a small sports car runs into the machine from behind. (i) which vehicle experiences a change of momentum of larger magnitude? a) the car does b) the tractor does c) their momentum changes are the same size d) it could be either vehicle (ii) which vehicle experiences a larger change in kinetic energy? a) the car does b) the tractor does c) their kinetic energy changes are the same size d) it could be either vehicle